tdf#125706 and tdf#125665 writer, speed up RDF

The RDF stuff is sloooooooow, so (a) add some caching and (b) fold a
very hot UNO_QUERY call.

To add the caching we need to add a new UNO interface, since
XEnumeration is not amenable to being cached.

Add an optimised getStatementsGraph_NoLock2 that skips the intermediate
enumeration object, and consequently a lot of locking/unlocking.

Cache by OUString key, to avoid expensive OUString<->OString conversion
when looking up entries in the cache.

For the test document in tdf#125706, this takes the time from 7s to 5s for me.

For the test document in tdf#125665, this takes the load time
from 60s to 7s for me.

Change-Id: I207387e975b4f107834edd0974134c481fb4012d
Reviewed-on: https://gerrit.libreoffice.org/74740
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 5 insertions, 3 deletions

diff --git a/sw/source/core/edit/edfcol.cxx b/sw/source/core/edit/edfcol.cxx
index 4df464ee49ed..a61964900a1d 100644
--- a/sw/source/core/edit/edfcol.cxx
+++ b/sw/source/core/edit/edfcol.cxx
@@ -1157,12 +1157,14 @@ void SwEditShell::SetClassification(const OUString& rName, SfxClassificationPoli
     }
 }
 
+// We pass xParent and xNodeSubject even though they point to the same thing because the UNO_QUERY is
+// on a performance-sensitive path.
 static void lcl_ApplyParagraphClassification(SwDoc* pDoc,
                                       const uno::Reference<frame::XModel>& xModel,
                                       const uno::Reference<text::XTextContent>& xParent,
+                                      const css::uno::Reference<css::rdf::XResource>& xNodeSubject,
                                       std::vector<svx::ClassificationResult> aResults)
 {
-    css::uno::Reference<css::rdf::XResource> xNodeSubject(xParent, uno::UNO_QUERY);
     if (!xNodeSubject.is())
         return;
 
@@ -1279,7 +1281,7 @@ void SwEditShell::ApplyParagraphClassification(std::vector<svx::ClassificationRe
 
     uno::Reference<frame::XModel> xModel = pDocShell->GetBaseModel();
     uno::Reference<text::XTextContent> xParent = SwXParagraph::CreateXParagraph(*pNode->GetDoc(), pNode);
-    lcl_ApplyParagraphClassification(GetDoc(), xModel, xParent, std::move(aResults));
+    lcl_ApplyParagraphClassification(GetDoc(), xModel, xParent, css::uno::Reference<css::rdf::XResource>(xParent, uno::UNO_QUERY), std::move(aResults));
 }
 
 static std::vector<svx::ClassificationResult> lcl_CollectParagraphClassification(const uno::Reference<frame::XModel>& xModel, const uno::Reference<text::XTextContent>& xParagraph)
@@ -1987,7 +1989,7 @@ void SwEditShell::RestoreMetadataFieldsAndValidateParagraphSignatures()
             }
 
             // Update classification based on results.
-            lcl_ApplyParagraphClassification(GetDoc(), xModel, xParagraph, aResults);
+            lcl_ApplyParagraphClassification(GetDoc(), xModel, xParagraph, xSubject, aResults);
 
             // Get Signatures
             std::map<OUString, SignatureDescr> aSignatures;